Vendor dependencies

notes-service/vendor/sqlx/tests/migrate/migrations_simple/20220721115250_add_test_table.sql

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+CREATE TABLE migrations_simple_test (
+    some_id BIGINT NOT NULL PRIMARY KEY,
+    some_payload BIGINT NOT NUll
+);
+
+INSERT INTO migrations_simple_test (some_id, some_payload)
+VALUES (1, 100);

notes-service/vendor/sqlx/tests/migrate/migrations_simple/20220721115524_convert_type.sql

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+-- Perform a tricky conversion of the payload.
+--
+-- This script will only succeed once and will fail if executed twice.
+
+-- set up temporary target column
+ALTER TABLE migrations_simple_test
+ADD some_payload_tmp TEXT;
+
+-- perform conversion
+-- This will fail if `some_payload` is already a string column due to the addition.
+-- We add a suffix after the addition to ensure that the SQL database does not silently cast the string back to an 
+-- integer.
+UPDATE migrations_simple_test
+SET some_payload_tmp = CONCAT(CAST((some_payload + 10) AS TEXT), '_suffix');
+
+-- remove original column including the content
+ALTER TABLE migrations_simple_test
+DROP COLUMN some_payload;
+
+-- prepare new payload column (nullable, so we can copy over the data)
+ALTER TABLE migrations_simple_test
+ADD some_payload TEXT;
+
+-- copy new values
+UPDATE migrations_simple_test
+SET some_payload = some_payload_tmp;
+
+-- "freeze" column
+ALTER TABLE migrations_simple_test
+ALTER COLUMN some_payload SET NOT NULL;
+
+-- clean up
+ALTER TABLE migrations_simple_test
+DROP COLUMN some_payload_tmp;